TopSentinel
ESStart free

Open beta: free while it lasts

Your on-call
SRE

Watches your servers while you sleep. When something breaks, it pings you on Telegram, explains what happened and helps you fix it.

Start free See how it works

One-command install · No credit card · Nothing runs without your approval

Works with what you already use

DockerDocker ComposeCoolifyDokployTraefikCaddyUbuntuDebianHetznerDigitalOceanAWSTelegramSlackDockerDocker ComposeCoolifyDokployTraefikCaddyUbuntuDebianHetznerDigitalOceanAWSTelegramSlack

What it does for you
while you sleep

Fewer scares, answers in minutes and safe fixes, without hiring anyone or carrying a pager.

  • Monitoring · 3 servers

    every 60 s
    • Disk (with forecast)OK
    • Memory and OOMOK
    • Sustained CPUOK
    • Crash-looping containersAttention
    • Health checksOK
    • TLS certificates21 days
    • Server gone silentOK

    Telegram · now

    🔴 api-prod · shop-api is crash-looping (6 times in 10 min)

    Deterministic rules: monitoring doesn't spend AI.

This is what 3 a.m. looks like

03:14
TS

TopSentinel

bot

🔴 shop-prod · Disk will be full in ~40 min

Currently at 96%, growing 4 points an hour.

If you do nothing: the database will stop writing.

03:12

🔎 Diagnosis

System logs grew 3.1 GB since yesterday's deploy: the app was left in debug mode.

03:12

🧹 Shrink system logs to 500 MB

Only runs if you approve it

Approved ✓ 03:13

✅ Done · Journal shrunk to 500 MB (2.6 GB freed)

03:13

🔎 Check · Disk is now at 64%.

I'll remind you tomorrow to turn off debug mode.

03:14

From alert to fix, with your permission.

  1. Your server
    TopSentinel
    You

    $ curl -fsSL https://api.topsentinel.io/install.sh | sudo sh -s -- --token ts_••••

    ts-agent installed · unprivileged

    ts-executor installed · no network · actions disabled

    Connected to TopSentinel (outbound, WSS) · no open ports

Like having someone technical inside your servers.

Write to it like you'd write to a teammate. Before answering it looks at metrics, containers, logs, changes, ports, SSH logins and certificates.

Pick simple answers, no jargon, or technical ones, with numbers and commands. Try it in the chat.

TopSentinel

bot

  • How's everything?

  • Why does the API keep crashing?

  • What changed since yesterday?

  • What do I have exposed to the internet?

Limited hands, and always with your permission.

Letting something touch production takes trust. That's why the design assumes any piece can fail, ours included.

  • The AI never runs anything

    It can only propose actions from a closed catalog. No free-form commands, no shell access.

  • Signed orders

    Every approved action is signed with Ed25519. Your server verifies the signature, target, expiry (2 min) and that it was never used before.

  • No open ports

    The agent only connects out to TopSentinel. The process with Docker access has no network.

  • TOTP for your data

    Restarting a database or a queue asks for your 6-digit code, even if someone stole your Telegram.

  • You hold the switch

    Actions ship disabled on every server. /pause blocks them across your whole account instantly.

  • Lightweight agent

    Two ~6 MB Go binaries. About 18 MB of RAM between them. One-command install.

Built for you if…

  • You run 1 to 10 servers

    On Hetzner, DigitalOcean, AWS or wherever, with Docker.

  • You deploy with compose

    By hand, with Coolify or Dokploy, maybe with some help from AI.

  • You don't want to be on call

    And you don't have, or need, an SRE team.

  • You'd rather get a Telegram than a complaint

    Hear it from a message, not from an angry customer.

Running Kubernetes with hundreds of nodes and an on-call rotation? Then there are better-suited tools for you, and that's fine.

Sleep well.
Someone's on call.

We're in beta: free while it lasts. Connect your first server in under 10 minutes.

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